Philips DreamStation Review: Recalled ASV Machine

⚠️ CRITICAL UPDATE: The Philips DreamStation BiPAP autoSV Advanced was part of a major recall in June 2021. Philips stopped selling all CPAP and BiPAP machines in the United States as of January 2024. This article provides educational information about the device and explains safer alternatives for ASV therapy.

Back in 2021, I watched the sleep apnea community go through what I can only describe as a crisis.

Thousands of people woke up to news that their Philips machines—devices they’d been breathing through every night—contained foam that could be breaking down and releasing potentially harmful particles into their airways.

The Philips DreamStation BiPAP autoSV Advanced was caught right in the middle of this recall. It’s a machine that, before the recall, represented some of the most advanced adaptive servo-ventilation (ASV) technology available for treating central sleep apnea and complex sleep apnea.

While I personally use ResMed equipment—specifically the AirSense 10 at home and AirMini for travel with my F20 full-face mask—I’ve spent considerable time researching the DreamStation line because so many readers have asked me about it during the recall chaos. This review will help you understand what made this machine significant, why it was recalled, and what safer alternatives exist today.

Understanding the Philips Recall: What Happened

In June 2021, Philips issued a voluntary recall affecting approximately 10 million devices worldwide, including the DreamStation BiPAP autoSV Advanced. The problem centered on polyester-based polyurethane (PE-PUR) foam used inside these machines to reduce noise and vibration.

The foam was found to potentially break down over time—especially when exposed to heat, humidity, or ozone cleaning methods—releasing small black particles and volatile organic compounds (VOCs) that users could inhale or swallow through their airways.

Health Risks Associated with the Foam

According to FDA reports, the degraded foam posed several potential health risks, including respiratory irritation, headaches, asthma exacerbation, hypersensitivity reactions, and potential toxic effects on organs like the kidneys and liver. Between April 2021 and January 2024, the FDA received over 116,000 medical device reports related to these Philips devices, including 561 deaths.

Current Status of Philips Devices

As of January 2024, Philips stopped selling all CPAP and BiPAP machines in the United States following a consent decree with the FDA and Department of Justice. While Philips remediated approximately 99% of registered devices globally by replacing the PE-PUR foam with silicone foam, many of these replacement devices also faced scrutiny, with the FDA warning that even the new silicone foam may release certain chemicals of concern.

If you currently use a recalled Philips device: Consult with your sleep physician immediately. The decision to continue using a recalled device should be made jointly with your healthcare provider, weighing the risks of the foam against the serious health consequences of untreated sleep apnea.

What Made the DreamStation BiPAP autoSV Advanced Special (Before the Recall)

Before diving into why this machine mattered in the sleep apnea world, let me be clear: I’m not recommending anyone purchase this device given its recall status. However, understanding what it was designed to do helps explain why so many people were affected by the recall and what alternatives they should look for.

The DreamStation BiPAP autoSV Advanced was specifically designed for individuals with:

• Central sleep apnea (CSA): A condition where the brain fails to send proper signals to breathing muscles
• Complex sleep apnea syndrome: A combination of obstructive and central apneas
• Cheyne-Stokes respiration (CSR): An abnormal breathing pattern often associated with heart failure

Unlike standard CPAP machines that deliver continuous pressure, ASV machines like the DreamStation monitor breathing patterns breath-by-breath and automatically adjust both inspiratory and expiratory pressure in real-time to stabilize breathing.

How ASV Therapy Works: The Medical Science

Adaptive servo-ventilation represents a sophisticated approach to treating central sleep apnea that goes beyond what traditional CPAP or even BiPAP machines can accomplish.

The Core Technology

ASV machines deliver servo-controlled inspiratory pressure support on top of expiratory positive airway pressure. Research published in the Journal of Clinical Sleep Medicine demonstrates that ASV therapy effectively normalizes the apnea-hypopnea index (AHI) in patients with central sleep apnea by providing variable pressure support and backup ventilation to stabilize breathing patterns.

The DreamStation’s algorithm worked by:

1. Monitoring breathing patterns: The machine tracked each breath in real-time
2. Detecting apneas: When central apneas occurred (breathing stopped due to lack of brain signals), the machine detected them immediately
3. Providing backup breaths: An automatic backup rate triggered machine-assisted breaths during central apneas
4. Adjusting pressure dynamically: The machine varied both EPAP (expiratory positive airway pressure) and pressure support based on detected obstructive events
5. Minimizing intervention: The algorithm aimed for the lowest possible pressure needed to maintain stable breathing

Medical Evidence on ASV Effectiveness

Studies published in CHEST journal in 2024 found that ASV therapy significantly improved sleep quality in patients with central sleep apnea across a range of devices and indications. Patients using ASV demonstrated improvements in the Pittsburgh Sleep Quality Index (PSQI) scores and patient-reported outcomes.

However, it’s crucial to understand the limitations. The landmark SERVE-HF trial published in the New England Journal of Medicine raised serious concerns about ASV use in patients with heart failure with reduced ejection fraction (LVEF ≤45%) and moderate to severe central sleep apnea, finding increased all-cause and cardiovascular mortality in this specific population.

The American Academy of Sleep Medicine now recommends against using ASV in patients with heart failure and ejection fraction ≤45% with moderate to severe central sleep apnea, while maintaining it as an option for patients with LVEF >45% or mild central sleep apnea.

Key Features the DreamStation Offered

1. Auto-Adjusting Pressure Algorithms

The machine used Philips’ proprietary algorithms to deliver dynamic pressure adjustments, maintaining a target ventilation level to prevent both under-breathing and over-breathing—critical for managing the erratic breathing patterns of central sleep apnea.

2. User-Friendly Interface

One area where the DreamStation genuinely excelled was its intuitive design. The large color touchscreen display made navigation straightforward compared to some competing ASV machines. For users who weren’t tech-savvy, this was a significant advantage.

3. Bluetooth Connectivity and DreamMapper App

The DreamMapper app allowed users to:

• Track therapy metrics like AHI, leak rates, and usage hours
• Set personal goals and receive coaching tips
• Share data with physicians for remote monitoring

This connectivity feature was ahead of its time when the machine launched, though ResMed’s myAir app has since become the industry standard for data tracking.

4. Comfort Features

Bi-Flex Technology: This provided pressure relief during exhalation, creating a more natural breathing sensation—similar in concept to the EPR feature on ResMed machines.

Adjustable Ramp Function: Like most modern machines, it allowed starting therapy at lower pressure that gradually increased as you fell asleep.

Optional Heated Humidifier: This was integrated but removable, addressing CPAP dry mouth and nasal irritation—though having to purchase it separately was a common complaint.

5. Portability

At 2.94 pounds, the DreamStation was remarkably light for an ASV machine, making it more travel-friendly than many competitors. Though for serious CPAP travel, dedicated travel machines like the ResMed AirMini remain the gold standard.

Comparing the DreamStation to Current ASV Alternatives

Given the recall, anyone who was using a DreamStation BiPAP autoSV Advanced needs to know what safer alternatives exist today.

ResMed AirCurve 10 ASV

The ResMed AirCurve 10 ASV has become the most commonly prescribed alternative. While similar in therapeutic capability to the DreamStation, key differences include:

Advantages over DreamStation:

• Not affected by the Philips recall
• Slightly more refined adaptive algorithms according to sleep physicians
• Comprehensive data tracking through myAir app
• Available for purchase (unlike DreamStation)

Where DreamStation Had Edge:

• More intuitive initial setup interface
• Slightly lighter for travel
• Integrated Bluetooth (AirCurve requires cellular modem for wireless connectivity)

ResMed AirCurve 11 ASV

The newer AirCurve 11 ASV represents ResMed’s latest ASV technology, incorporating improvements like:

• Personal Therapy Assistant for troubleshooting
• Climate Control Auto for optimal humidification
• Enhanced data capabilities
• Quieter operation

Fisher & Paykel SleepStyle AutoSV

Another alternative worth considering, particularly for users who prioritize comfort features. The ThermoSmart™ technology provides excellent humidification, though the machine operates slightly louder than the DreamStation did.

Who Should Consider ASV Therapy (With Safer Alternatives)

ASV therapy remains appropriate for specific patient populations—you just need a machine not affected by the Philips recall.

Ideal candidates include individuals with:

• Treatment-emergent central sleep apnea (when CPAP therapy causes central apneas to develop)
• Idiopathic central sleep apnea
• Central sleep apnea related to opioid use
• Central sleep apnea with neurological conditions
• Complex sleep apnea syndrome
• Cheyne-Stokes respiration (with careful medical supervision regarding heart function)

ASV is generally NOT recommended for:

• Patients with heart failure and ejection fraction ≤45% with moderate to severe central sleep apnea (based on SERVE-HF trial results)
• Obstructive sleep apnea without central component (standard CPAP or BiPAP is more appropriate)
• Most cases of simple obstructive sleep apnea

The Bigger Picture: What the Philips Recall Taught Us

Having watched this recall unfold over the past several years, several lessons emerge that matter for anyone using sleep therapy equipment:

1. Regular Equipment Replacement Matters

The PE-PUR foam breakdown was worse in older machines, particularly those over 3-5 years old. Following CPAP replacement schedules isn’t just about optimal therapy—it’s about safety.

2. Avoid Unapproved Cleaning Methods

The foam degradation was accelerated by ozone-based cleaning systems. I’ve always recommended manual CPAP cleaning with soap and water for this exact reason. The FDA does not recommend ozone cleaners for CPAP equipment.

3. Register Your Equipment

One major issue with the recall was that Philips couldn’t reach all affected users. Always register your CPAP equipment with the manufacturer and keep your contact information current.

4. Stay Informed Through Your Sleep Physician

Your sleep specialist should be monitoring FDA safety communications and proactively contacting you about any issues. If they’re not, that’s a red flag about your quality of care.

Practical Next Steps If You’re Affected

If you were using a DreamStation BiPAP autoSV Advanced or any recalled Philips device:

1. Don’t panic, but do act: Continue therapy while consulting your physician. Untreated central sleep apnea carries serious health risks including cardiovascular problems and stroke
2. Contact your sleep physician immediately: Schedule an appointment to discuss replacement options
3. Document your situation: Keep records of your device use, any symptoms, and communications with Philips and your healthcare providers
4. Explore replacement options: Depending on your insurance and the remediation program, you may be eligible for a replacement device or reimbursement
5. Consider legal consultation: If you experienced health problems potentially related to foam exposure, you may want to discuss your options with an attorney specializing in medical device litigation

Understanding ASV vs. CPAP vs. BiPAP

Many readers ask me about the differences between these therapies, so let me clarify:

CPAP (Continuous Positive Airway Pressure): Delivers a single, constant pressure throughout the breathing cycle. Works well for straightforward obstructive sleep apnea but ineffective for central apneas.

BiPAP (Bilevel Positive Airway Pressure): Provides two pressure levels—higher for inhalation, lower for exhalation. Better tolerated by some users and helpful for certain respiratory conditions, but doesn’t address central apneas.

ASV (Adaptive Servo-Ventilation): Monitors breathing breath-by-breath and automatically adjusts pressure support and provides backup breaths when central apneas occur. Specifically designed for central and complex sleep apnea.

For a comprehensive comparison, see my detailed article on ASV vs BiPAP vs CPAP.

Maintaining Your Sleep Apnea Therapy During Transition

If you’re transitioning from a recalled DreamStation to a new machine, here are my practical tips from talking with readers who’ve gone through this:

Keep Your Existing Supplies

Your CPAP mask, tubing, and other supplies should be compatible with your replacement machine. Don’t throw these away until your new setup is working well.

Prepare for an Adjustment Period

Even switching between two ASV machines takes some getting used to. The algorithms differ slightly, and you might need a new CPAP titration study to optimize your pressure settings.

Document Your Current Settings

Before switching machines, record all your current DreamStation settings and therapy data. This information helps your sleep physician program your new device appropriately.

Be Patient with Data Tracking

If you switch to ResMed’s AirCurve, the myAir app works differently than DreamMapper. Give yourself time to learn the new system—it’s actually quite good once you understand it.

The Role of Medical Supervision in ASV Therapy

This recall highlighted something critical: ASV therapy isn’t something you just set and forget. These machines require ongoing medical supervision because:

1. Settings need adjustment: As your condition changes, your ASV settings may need modification
2. Monitoring is essential: Regular review of CPAP data ensures therapy remains effective
3. Side effects need management: Issues like aerophagia or mask leaks require professional troubleshooting
4. Cardiac monitoring may be needed: Especially for patients with heart conditions using ASV

If you haven’t had a follow-up sleep study in over two years, schedule one. Your needs may have changed.

Alternative Approaches to Central Sleep Apnea

While ASV represents the gold standard for many cases of central sleep apnea, other treatment approaches exist:

Optimizing Underlying Conditions

Treating underlying heart failure, adjusting medications that may contribute to central apneas (like opioids), or managing other medical conditions can sometimes reduce or eliminate central sleep apnea.

Traditional CPAP with Careful Monitoring

Some patients with mild central sleep apnea improve with standard CPAP therapy. Your sleep physician can determine if this is appropriate through careful monitoring.

Oxygen Supplementation

Supplemental oxygen during sleep helps some patients with central sleep apnea, particularly those with heart failure. However, this approach has limitations and isn’t appropriate for everyone.

Emerging Therapies

Research into medications like acetazolamide and technologies like hypoglossal nerve stimulation continues, though these aren’t yet mainstream for central sleep apnea treatment.

Cost Considerations and Insurance Coverage

ASV machines are significantly more expensive than standard CPAP machines, typically ranging from $3,000-$6,000. Most insurance plans cover ASV therapy when medically necessary, but requirements include:

• Documented diagnosis of central sleep apnea or complex sleep apnea
• Failed trial of CPAP or BiPAP (in many cases)
• Prescription from a sleep physician
• Regular compliance monitoring

The Philips recall created additional complications around CPAP insurance compliance, so work closely with your DME provider and insurance company if you need a replacement device.

My Personal Take on the Recall Situation

Look, I’ll be honest with you—the Philips recall shook my trust in the industry. The fact that a major manufacturer had evidence of foam problems for years before issuing the recall is deeply troubling. It reminds me why I’ve been so transparent about actually using the equipment I write about.

I’ve stuck with ResMed equipment throughout my CPAP journey, partly because I started with their machines, but events like this validate that choice. That said, I know plenty of people who used DreamStation machines successfully for years before the recall, and many were devastated to lose devices that were working well for them.

The silver lining? The recall forced the industry to improve transparency and safety standards. The FDA’s consent decree with Philips includes stringent oversight requirements that should prevent similar issues in the future.

But here’s what really matters: if you need ASV therapy, don’t let this recall scare you away from treatment. Central sleep apnea is serious—it increases your risk of stroke, cardiovascular problems, and numerous other health issues. Safe ASV alternatives exist, and they work incredibly well.

Final Thoughts: Looking Forward

The Philips DreamStation BiPAP autoSV Advanced represented significant technological advancement in treating central sleep apnea before the recall. Its intuitive interface, advanced algorithms, and portable design made it a popular choice among sleep physicians and patients alike.

However, the recall changed everything. Today, the focus must be on safe alternatives like the ResMed AirCurve line that provide similar or superior therapeutic benefits without the foam contamination risks.

If you’re currently using ASV therapy or considering it, work closely with a qualified sleep physician who stays current with the latest research and safety information. The landscape has changed significantly since 2021, and you need a provider who understands both the therapeutic benefits of ASV and the important safety considerations around specific devices.

For those dealing with central sleep apnea, don’t give up. Effective, safe treatment exists. The DreamStation recall was a setback for many, but it doesn’t change the fundamental fact that when properly treated, central sleep apnea is manageable.

Keep breathing, stay informed, and don’t hesitate to advocate for yourself in getting the treatment you need.

References

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⚠️ MEDICAL DISCLAIMER This blog provides general information only and is not a substitute for professional medical advice, diagnosis, or treatment. Sleep apnea is a serious condition, and CPAP equipment should be used under proper medical supervision. Always consult your doctor or sleep specialist before starting, stopping, or changing any therapy. I share personal experiences as a CPAP user, not as a medical professional. Individual results vary. For medical guidance, please consult a qualified clinician or the American Academy of Sleep Medicine (aasm.org).